JP2020190706A - Voice coil motor with buffer effect - Google Patents

Abstract

To provide a voice coil motor that provides a buffer effect and is capable of extending service lifetime.SOLUTION: A frame body internally includes an activity space, and a first contact surface and a second contact surface 25 relative to the first contact surface are provided in the activity space. A mounting hole 31 used for the mounting of a lens is provided in a movable seat body 30. The movable seat body 30 includes a first surface 32 relative to the first contact surface and a second surface relative to the second contact surface 25, and, in the activity space, reciprocates between a first position in contact with the first contact surface and a second position in contact with the second contact surface 25. When the movable seat body 30 is located at the first position, the first surface 32 or the first contact surface comes into contact with a first buffer pad 40. When the movable seat body 30 is located at the second position, the second surface or the second contact surface 25 mutually comes into contact with a second buffer pad 50.SELECTED DRAWING: Figure 2

Description

The present invention relates to a voice coil motor having a cushioning effect, which is used for mounting a lens, can effectively reduce an impact generated during operation, and can extend the service life.

Voice coil motors are mainly used in mobile devices such as digital cameras, digital video cameras, smartphones, tablets, and laptop computers. The voice coil motor has advantages such as small volume, low price, and low power consumption. A small lens is mounted on the voice coil motor, and the small lens is driven by an excitation reaction after energization through a magnet and an induction coil. However, the zoom effect of the small lens can be achieved.

Conventionally, for example, the voice coil motor described in Patent Document 1 is known.
This is an "axial actuator with an elastic connecting portion" and includes a fixed portion, a movable portion, and a connecting portion. The connecting portion is used to connect the fixed portion and the movable portion, and forms a state in which the fixed portion and the movable portion are axially attached to each other, and the fixed portion and the movable portion are formed by a fixed magnet and a coil, respectively. Yes, when an electric current is applied to the moving part, the moving part moves relative to the fixed part based on the magnitude of the current, achieving the purpose of providing axial movement, and at the same time, the kinetic energy repels each other in the magnetic field. Since it is derived from force, it also has an anti-vibration effect.
Further, when the movable portion causes axial movement in the fixed portion, the movable portion is regulated by the connecting portion in order to regulate the movement of the movable portion.

In addition, Patent Document 2 and Patent Document 3 disclose "a flat plate elastic piece and a voice coil motor provided with the flat plate elastic piece" and "a lens operating device, a vibration absorbing elastic piece and a method for manufacturing the same", respectively. There is. They achieve the effects of position regulation and buffering on the above-mentioned moving parts through elastic pieces.

However, when the above-mentioned movable part moves in the axial direction, the movable part fulfills the functions of position regulation and buffer by the connecting part (or elastic piece), but when the movable part moves to the upper and lower extreme positions, the housing Is prone to collision.
In current voice coil motors, most of the moving parts are formed by injection molding a plastic material, and most of the housing is manufactured by using a metal material or a plastic material, so that the moving parts are manufactured over a long period of time. When the movable part and the housing collide with each other when the movable part moves to the upper and lower extreme positions, the movable part or the shell body causes debris to be generated by the collision, and the debris remains between the fixed part and the movable part. If it continues for a long period of time, the voice coil motor is likely to be damaged, and the service life of the voice coil motor is shortened.

Taiwan Patent Publication No. I265668 Taiwan Patent Publication No. I437996 Taiwan Patent Publication No. I410733

An object to be solved by the present invention is to provide a voice coil motor having a cushioning effect and capable of extending the service life.

The voice coil motor provided with the cushioning effect of the present invention is used for mounting a lens, and includes a frame body, a movable seat body, a first buffer pad, and a second buffer pad, and the frame body is an active space inside. A first contact surface and a second contact surface facing the first contact surface are provided in the active space, and the movable seat is housed in the active space and reciprocates. , A mounting hole used for mounting the lens is provided inside, and the movable seat is adjacent to the first contact surface and adjacent to the first surface and adjacent to the second contact surface. A second position in which the movable seat body has a second surface facing each other and the movable seat body is in contact with the first contact surface and a second contact surface in contact with the second contact surface. When the first cushioning pad is installed on the first contact surface and the movable seat is in the first position, the first surface and the first cushioning pad move back and forth between the positions. When they are in contact with each other and the second buffer pad is installed on the second contact surface and the movable seat is in the second position, the second surface and the second buffer pad come into contact with each other. ..

In one embodiment, the first buffer pad and the second buffer pad are made of either a silicone material or anti-vibration rubber.

In one embodiment, the first buffer pad and the second buffer pad are formed directly on the first contact surface and the second contact surface by an injection molding method, respectively.

In one embodiment, the movable seat has at least one first protruding portion projected from the upper surface, which is the outer surface on the first surface side, toward the first contact surface, and the first surface is the first surface. 1 Arranged on the protrusion.

In one embodiment, the movable seat has at least one second protruding portion projected from the bottom surface, which is the outer surface of the second surface side, toward the second contact surface, and the second surface is the second surface. 2 Arranged on the protrusion.

The voice coil motor having another cushioning effect of the present invention is used for mounting a lens, and includes a frame body, a movable seat body, a first buffer pad, and a second buffer pad, and the frame body is inside. It is provided with an active space, and a first contact surface and a second contact surface facing the first contact surface are provided in the active space, and the movable seat is housed in the active space and reciprocates. A mounting hole that moves and is used for mounting a lens is provided inside, and the movable seat is adjacent to the first contact surface and adjacent to the first surface and adjacent to the second contact surface. The movable seat body is provided with a second surface facing each other, and the movable seat body is brought into contact with the first contact surface and the second contact surface in the active space. When the first buffer pad is installed on the first surface and the movable seat is in the first position by reciprocating between the second position, the first contact surface and the first buffer When the pads are in contact with each other, the second cushioning pad is installed on the second surface, and the movable seat is in the second position, the second contact surface and the second cushioning pad are mutually attached. Contact.

In one embodiment, the first buffer pad and the second buffer pad are made of either a silicone material or anti-vibration rubber.

In one embodiment, the first buffer pad and the second buffer pad are directly formed on the first surface and the second surface by an injection molding method, respectively.

In one embodiment, the movable seat has at least one first protruding portion projected from the upper surface, which is the outer surface on the first surface side, toward the first contact surface, and the first surface is the first surface. 1 Arranged on the protrusion.

In one embodiment, at least one second protruding portion is projected from the bottom surface, which is the outer surface of the movable seat body on the second surface side, toward the second contact surface, and the second surface is the second surface. It is placed above the protrusion.

The voice coil motor provided with the cushioning effect of the present invention has the following advantages as compared with the prior art.
When the movable seat reciprocates in the frame through the first position and the second position, the first buffer pad and the second buffer pad reduce the collision between the movable seat and the frame, and the movable seat and the movable seat The life can be extended by reducing problems such as debris, dust, and dirt generated by collisions between frames.

It is a perspective view of the voice coil motor provided with the cushioning effect which shows Example 1 of this invention. FIG. 5 is an exploded perspective view of a voice coil motor having a cushioning effect according to a first embodiment of the present invention as viewed from diagonally above. FIG. 5 is an exploded perspective view of a voice coil motor having a cushioning effect according to a first embodiment of the present invention as viewed from diagonally below. It is sectional drawing of the voice coil motor which provided the cushioning effect which shows Example 1 of this invention. It is sectional drawing when the movable seat body of the voice coil motor which provided the cushioning effect which shows Example 1 of this invention is in a 1st position. It is sectional drawing when the movable seat body of the voice coil motor which provided the cushioning effect which shows Example 1 of this invention is in a 2nd position. FIG. 5 is an exploded perspective view of a voice coil motor having a cushioning effect according to a second embodiment of the present invention as viewed from diagonally above. FIG. 5 is an exploded perspective view of a voice coil motor having a cushioning effect according to a second embodiment of the present invention as viewed from diagonally below. It is sectional drawing of the voice coil motor which provided the cushioning effect which shows Example 2 of this invention. It is sectional drawing when the movable seat body of the voice coil motor which provided the cushioning effect which shows Example 2 of this invention is in a 1st position. It is sectional drawing when the movable seat body of the voice coil motor which provided the cushioning effect which shows Example 2 of this invention is in a 2nd position.

Hereinafter, examples of the present invention will be described in detail with reference to the drawings. Needless to say, the present invention is not limited to the examples.

[Example 1]
1 to 6 show Example 1 of the present invention.
In the first embodiment, the voice coil motor 10 having a cushioning effect is used for mounting a lens (not shown because it is a conventional technique), and the frame body 20, the movable seat body 30, and the first cushioning pad are used. 40 and a second buffer pad 50 are included.

The frame body 20 is provided with an activity space 21 inside, and is composed of a seat body 22 and a lid body 23.
The lid 23 includes a first contact surface 24 located inside the active space 21. The seat 22 is located in the active space 21 and includes a second contact surface 25 facing the first contact surface 24. In the present embodiment, a through hole 231 communicated with the active space 21 is provided at the central position of the lid 23, and a through hole 221 similarly communicated with the active space 21 is provided in the seat body 22, and the through hole 231 is provided. And the through hole 221 are located on the same axis.

The movable seat 30 is installed in the active space 21 of the frame 20, and the movable seat 30 is formed with a mounting hole 31 used for mounting the lens, and the mounting hole 31 has the same axis as the through hole 231 and the through hole 221 respectively. The movable seat 30 is located above the center, and the outside of the movable seat 30 can be used for installing an induction coil (not shown because it is a conventional technique) along the circumferential direction of the mounting hole 31.
In addition, the first surface 32 is installed along the circumferential direction of the mounting hole 31 at a position adjacent to the first contact surface 24 of the movable seat 30, and is located adjacent to the second contact surface 25. Two surfaces 33 are installed, the first surface 32 and the first contact surface 24 are adjacent to each other and face each other, and the second surface 33 and the second contact surface 25 are adjacent to each other and face each other.

At least one first protruding portion 35 is projected from the upper surface 34, which is the outer surface of the movable seat 30 on the first surface 32 side, toward the first contact surface 24, and the first surface 32 is above the first protruding portion 35. Is placed in.
At least one second protrusion 37 is projected from the bottom surface 36, which is the outer surface of the movable seat 30 on the second surface 33 side, toward the second contact surface 25, and the second surface 33 is on the second protrusion 37. Is placed in.
In this embodiment, four first protrusions 35 are projected on the upper surface 34, four second protrusions 37 are similarly projected on the bottom surface 36, and the first protrusion 35 is formed on each first protrusion 35. The surface 32 is formed, and the second surface 33 is formed on each of the second protrusions 37.

The first buffer pad 40 is installed between the first contact surface 24 and the first surface 32.
In this embodiment, the first buffer pad 40 is made of a silicone material and the first buffer pad 40 is arranged on the first contact surface 24. An injection molding method is mainly adopted for forming the first cushioning pad 40, first, the lid 23 is placed in a first mold (not shown), and the first contact surface 24 is placed in the first mold. When the liquid silicon material is injected into the first molding space after being exposed in one molding space and the liquid silicon material is cooled and solidified in the first molding space, the first contact surface 24 The first buffer pad 40 is formed on the first buffer pad 40.

The second buffer pad 50 is installed between the second contact surface 25 and the second surface 33.
In this embodiment, the second buffer pad 50 is also made of a silicone material, and the second buffer pad 50 is arranged on the second contact surface 25. Similarly, an injection molding method is adopted for forming the second buffer pad 50, the seat body 22 is first placed in a second mold (not shown), and the second contact surface 25 is the second mold of the second mold. 2 When exposed in the molding space, a liquid silicon material is injected into the second molding space, and the liquid silicon material is cooled and solidified in the second molding space, it is formed on the second contact surface 25. A second buffer pad 50 is formed on the surface.

Further, for the first buffer pad 40 and the second buffer pad 50, in addition to the silicon material, other materials having an anti-vibration effect such as anti-vibration rubber may be selected.

When the voice coil motor 10 of the present invention is applied to a camera module of a mobile device, the induction coil is driven by an excitation method by conduction of a circuit to cause the movable seat 30 to reciprocate in the active space 21, and the lens is moved. It can be moved to move within the frame 20 to achieve the zoom effect.
When the movable seat body 30 reciprocates, the first position 60 is formed at a position near the first contact surface 24, the second position 70 is formed at a position near the second contact surface 25, and the movable seat body 30 is formed. 30 forms the reciprocating movement between the first position 60 and the second position 70.

When the movable seat 30 moves in the direction of the first position 60, the first surface 32 moves in the direction of the first contact surface 24, and the first surface 32 comes into contact with the first buffer pad 40.
When the movable seat 30 moves from the first position 60 to the second position 70, the second surface 33 moves in the direction of the second contact surface 25, and the second surface 33 comes into contact with the second buffer pad 50. ..
As a result, when the movable seat 30 reciprocates between the first position 60 and the second position 70, the first buffer pad 40 avoids mutual collision between the first surface 32 and the first contact surface 24. Then, since the second buffer pad 50 can avoid mutual collision between the second surface 33 and the second contact surface 25, the first surface 32 and the first contact surface 32 and the first contact surface through the first buffer pad 40 and the second buffer pad 50. In addition to being able to buffer the collision that occurs between the surface 24 and the second surface 33 and the second contact surface 25, at the same time, the first surface 32 and the first contact surface 24, and the second surface 33 and the second contact surface 25 The problem of debris, dust, and dirt generated by the collision can be reduced, and the service life of the voice coil motor 10 can be effectively extended.

[Example 2]
7 to 11 show Example 2 of the present invention.
In the voice coil motor 10'of the second embodiment, the first buffer pad 40'is arranged on the first surface 32', and the second buffer pad 50'is arranged on the second surface 33'.
The first buffer pad 40'and the second buffer pad 50'are molded directly on the first surface 32'and the second surface 33'by an injection molding method, respectively. In the molding method, the movable seat 30'is mainly placed in a third mold (not shown), and the first surface 32'and the second surface 33' are simultaneously placed in the third molding space and the fourth mold of the third mold. When exposed in the molding space, the liquid silicon material is injected into the third molding space and the fourth molding space, and the liquid silicon material is cooled and solidified in the third molding space and the fourth molding space, The first buffer pad 40'is directly molded on the first surface 32', and the second buffer pad 50'is directly molded on the second surface 33'.

In this embodiment, the first buffer pad 40'is divided into four parts, each of which is formed on the corresponding first surface 32'. The second buffer pad 50'is similarly divided into four parts, each of which is formed on the corresponding second surface 33'.
As a result, when the movable seat body 30'is in the first position 60', the first buffer pad 40'on the first surface 32' is brought into contact with the first contact surface 24'. When the movable seat 30'is in the second position 70', the second buffer pad 50'on the second surface 33' is in contact with the second contact surface 25'.

Therefore, when the movable seat body 30'reciprocates between the first position 60' and the second position 70', the first buffer pad 40'uses the first surface 32'and the first contact surface 24'. Since mutual collision between the two can be avoided and mutual collision between the second surface 33'and the second contact surface 25'can be avoided by the second buffer pad 50', the first buffer pad 40'and the second buffer pad 50' It is possible to buffer the collision that occurs between the first surface 32'and the first contact surface 24', and the second surface 33'and the second contact surface 25'through', and at the same time, the first surface 32'and the first contact surface. The problem of debris, dust, and dirt generated between the surfaces 24'and due to the collision between the second surface 33'and the second contact surface 25'is also reduced, effectively extending the service life of the voice coil motor 10'. be able to.

The above is merely a description of the best embodiment of the present invention, and the scope of rights of the present application cannot be limited by this. Any modifications or changes made by those skilled in the art that do not deviate from the gist of the present invention are included in the scope of rights of the present application.

10, 10'Voice coil motor 20 Frame body 21 Active space 22 Seat body 221 Through hole 23 Lid body 231 Through hole 24, 24'First contact surface 25, 25'Second contact surface 30, 30'Movable seat 31 Mounting holes 32, 32'First surface 33, 33' Second surface 34 Top surface 35 First protrusion 36 Bottom surface 37 Second protrusion 40, 40'First buffer pad 50, 50'Second buffer pad 60, 60 '1st position 70, 70' 2nd position

Claims (10)

A voice coil motor having a cushioning effect used for mounting a lens, including a frame body, a movable seat body, a first buffer pad, and a second buffer pad.
The frame body has an active space inside, and a first contact surface and a second contact surface facing the first contact surface are provided in the active space.
The movable seat is housed in the active space and reciprocates, and a mounting hole used for mounting a lens is provided inside, and the movable seat is adjacent to the first contact surface and faces each other. A first surface having a first surface and a second surface adjacent to the second contact surface and facing each other, and the movable seat body being brought into contact with the first contact surface in the active space. It reciprocates between the position and the second position that is in contact with the second contact surface,
When the first cushioning pad is installed on the first contact surface and the movable seat is in the first position, the first surface and the first cushioning pad come into contact with each other.
When the second cushioning pad is installed on the second contact surface and the movable seat is in the second position, the second surface and the second cushioning pad come into contact with each other.
A voice coil motor with a cushioning effect. The voice coil motor having a cushioning effect according to claim 1, wherein the first buffer pad and the second buffer pad are made of either a silicon material or anti-vibration rubber. The cushioning effect according to claim 2, wherein the first buffer pad and the second buffer pad are directly formed on the first contact surface and the second contact surface by an injection molding method, respectively. Voice coil motor equipped with. At least one first protruding portion of the movable seat is projected from the upper surface, which is the outer surface of the first surface side, toward the first contact surface, and the first surface is placed on the first protruding portion. The voice coil motor having the cushioning effect according to claim 1, wherein the voice coil motor is arranged. At least one second protruding portion of the movable seat is projected from the bottom surface, which is the outer surface of the second surface side, toward the second contact surface, and the second surface is placed on the second protruding portion. The voice coil motor having the cushioning effect according to claim 1, wherein the voice coil motor is arranged. A voice coil motor having a cushioning effect used for mounting a lens, including a frame body, a movable seat body, a first buffer pad, and a second buffer pad.
The frame body has an active space inside, and a first contact surface and a second contact surface facing the first contact surface are provided in the active space.
The movable seat is housed in the active space and reciprocates, and a mounting hole used for mounting a lens is provided inside, and the movable seat is adjacent to the first contact surface and faces each other. A first surface having a first surface and a second surface adjacent to the second contact surface and facing each other, and the movable seat body being brought into contact with the first contact surface in the active space. It reciprocates between the position and the second position that is in contact with the second contact surface,
When the first cushioning pad is installed on the first surface and the movable seat is in the first position, the first contact surface and the first cushioning pad come into contact with each other.
When the second cushioning pad is installed on the second surface and the movable seat is in the second position, the second contact surface and the second cushioning pad come into contact with each other.
A voice coil motor with a cushioning effect. The voice coil motor having a cushioning effect according to claim 6, wherein the first buffer pad and the second buffer pad are made of either a silicon material or an anti-vibration rubber. The voice coil having a cushioning effect according to claim 7, wherein the first buffer pad and the second buffer pad are directly formed on the first surface and the second surface by an injection molding method, respectively. motor. At least one first protruding portion of the movable seat is projected from the upper surface, which is the outer surface on the first surface side, toward the first contact surface, and the first surface is placed on the first protruding portion. The voice coil motor having the cushioning effect according to claim 6, wherein the voice coil motor is arranged. At least one second protruding portion is projected from the bottom surface, which is the outer surface of the movable seat body on the second surface side, toward the second contact surface, and the second surface is above the second protruding portion. The voice coil motor having the cushioning effect according to claim 6, wherein the voice coil motor is arranged.